[PATCH 1/5] PCI: tegra: Fix argument order in tegra_pcie_phy_disable()

[PATCH 1/5] PCI: tegra: Fix argument order in tegra_pcie_phy_disable()

[Bjorn Helgaas]

The tegra_pcie_phy_disable() path called pads_writel() with arguments in
the wrong order.  Swap them to be the "value, offset" order expected by
pads_writel().

Fixes: 6fe7c187e026 ("PCI: tegra: Support per-lane PHYs")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thierry Reding <treding@nvidia.com>
CC: stable@vger.kernel.org	# v4.7+
---
 drivers/pci/host/pci-tegra.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index e2a8e4c..6df5ed0 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -859,7 +859,7 @@ static int tegra_pcie_phy_disable(struct tegra_pcie *pcie)
 	/* override IDDQ */
 	value = pads_readl(pcie, PADS_CTL);
 	value |= PADS_CTL_IDDQ_1L;
-	pads_writel(pcie, PADS_CTL, value);
+	pads_writel(pcie, value, PADS_CTL);
 
 	/* reset PLL */
 	value = pads_readl(pcie, soc->pads_pll_ctl);

[PATCH 2/5] PCI: tegra: Swap order of afi_writel() reg/val arguments

[Bjorn Helgaas]

Swap order of afi_writel() arguments to match the "dev, pos, val"
order used by pci_write_config_word() and other drivers.  No functional
change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/host/pci-tegra.c |  133 +++++++++++++++++++++---------------------
 1 file changed, 66 insertions(+), 67 deletions(-)

diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index 6df5ed0..146b69f 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -327,13 +327,12 @@ static inline struct tegra_pcie *sys_to_pcie(struct pci_sys_data *sys)
 	return sys->private_data;
 }
 
-static inline void afi_writel(struct tegra_pcie *pcie, u32 value,
-			      unsigned long offset)
+static void afi_writel(struct tegra_pcie *pcie, unsigned long offset, u32 value)
 {
 	writel(value, pcie->afi + offset);
 }
 
-static inline u32 afi_readl(struct tegra_pcie *pcie, unsigned long offset)
+static u32 afi_readl(struct tegra_pcie *pcie, unsigned long offset)
 {
 	return readl(pcie->afi + offset);
 }
@@ -531,13 +530,13 @@ static void tegra_pcie_port_reset(struct tegra_pcie_port *port)
 	/* pulse reset signal */
 	value = afi_readl(port->pcie, ctrl);
 	value &= ~AFI_PEX_CTRL_RST;
-	afi_writel(port->pcie, value, ctrl);
+	afi_writel(port->pcie, ctrl, value);
 
 	usleep_range(1000, 2000);
 
 	value = afi_readl(port->pcie, ctrl);
 	value |= AFI_PEX_CTRL_RST;
-	afi_writel(port->pcie, value, ctrl);
+	afi_writel(port->pcie, ctrl, value);
 }
 
 static void tegra_pcie_port_enable(struct tegra_pcie_port *port)
@@ -555,7 +554,7 @@ static void tegra_pcie_port_enable(struct tegra_pcie_port *port)
 
 	value |= AFI_PEX_CTRL_OVERRIDE_EN;
 
-	afi_writel(port->pcie, value, ctrl);
+	afi_writel(port->pcie, ctrl, value);
 
 	tegra_pcie_port_reset(port);
 }
@@ -569,7 +568,7 @@ static void tegra_pcie_port_disable(struct tegra_pcie_port *port)
 	/* assert port reset */
 	value = afi_readl(port->pcie, ctrl);
 	value &= ~AFI_PEX_CTRL_RST;
-	afi_writel(port->pcie, value, ctrl);
+	afi_writel(port->pcie, ctrl, value);
 
 	/* disable reference clock */
 	value = afi_readl(port->pcie, ctrl);
@@ -578,7 +577,7 @@ static void tegra_pcie_port_disable(struct tegra_pcie_port *port)
 		value &= ~AFI_PEX_CTRL_CLKREQ_EN;
 
 	value &= ~AFI_PEX_CTRL_REFCLK_EN;
-	afi_writel(port->pcie, value, ctrl);
+	afi_writel(port->pcie, ctrl, value);
 }
 
 static void tegra_pcie_port_free(struct tegra_pcie_port *port)
@@ -676,7 +675,7 @@ static irqreturn_t tegra_pcie_isr(int irq, void *arg)
 
 	code = afi_readl(pcie, AFI_INTR_CODE) & AFI_INTR_CODE_MASK;
 	signature = afi_readl(pcie, AFI_INTR_SIGNATURE);
-	afi_writel(pcie, 0, AFI_INTR_CODE);
+	afi_writel(pcie, AFI_INTR_CODE, 0);
 
 	if (code == AFI_INTR_LEGACY)
 		return IRQ_NONE;
@@ -725,54 +724,54 @@ static void tegra_pcie_setup_translations(struct tegra_pcie *pcie)
 	fpci_bar = 0xfe100000;
 	size = resource_size(pcie->cs);
 	axi_address = pcie->cs->start;
-	afi_writel(pcie, axi_address, AFI_AXI_BAR0_START);
-	afi_writel(pcie, size >> 12, AFI_AXI_BAR0_SZ);
-	afi_writel(pcie, fpci_bar, AFI_FPCI_BAR0);
+	afi_writel(pcie, AFI_AXI_BAR0_START, axi_address);
+	afi_writel(pcie, AFI_AXI_BAR0_SZ, size >> 12);
+	afi_writel(pcie, AFI_FPCI_BAR0, fpci_bar);
 
 	/* Bar 1: downstream IO bar */
 	fpci_bar = 0xfdfc0000;
 	size = resource_size(&pcie->io);
 	axi_address = pcie->io.start;
-	afi_writel(pcie, axi_address, AFI_AXI_BAR1_START);
-	afi_writel(pcie, size >> 12, AFI_AXI_BAR1_SZ);
-	afi_writel(pcie, fpci_bar, AFI_FPCI_BAR1);
+	afi_writel(pcie, AFI_AXI_BAR1_START, axi_address);
+	afi_writel(pcie, AFI_AXI_BAR1_SZ, size >> 12);
+	afi_writel(pcie, AFI_FPCI_BAR1, fpci_bar);
 
 	/* Bar 2: prefetchable memory BAR */
 	fpci_bar = (((pcie->prefetch.start >> 12) & 0x0fffffff) << 4) | 0x1;
 	size = resource_size(&pcie->prefetch);
 	axi_address = pcie->prefetch.start;
-	afi_writel(pcie, axi_address, AFI_AXI_BAR2_START);
-	afi_writel(pcie, size >> 12, AFI_AXI_BAR2_SZ);
-	afi_writel(pcie, fpci_bar, AFI_FPCI_BAR2);
+	afi_writel(pcie, AFI_AXI_BAR2_START, axi_address);
+	afi_writel(pcie, AFI_AXI_BAR2_SZ, size >> 12);
+	afi_writel(pcie, AFI_FPCI_BAR2, fpci_bar);
 
 	/* Bar 3: non prefetchable memory BAR */
 	fpci_bar = (((pcie->mem.start >> 12) & 0x0fffffff) << 4) | 0x1;
 	size = resource_size(&pcie->mem);
 	axi_address = pcie->mem.start;
-	afi_writel(pcie, axi_address, AFI_AXI_BAR3_START);
-	afi_writel(pcie, size >> 12, AFI_AXI_BAR3_SZ);
-	afi_writel(pcie, fpci_bar, AFI_FPCI_BAR3);
+	afi_writel(pcie, AFI_AXI_BAR3_START, axi_address);
+	afi_writel(pcie, AFI_AXI_BAR3_SZ, size >> 12);
+	afi_writel(pcie, AFI_FPCI_BAR3, fpci_bar);
 
 	/* NULL out the remaining BARs as they are not used */
-	afi_writel(pcie, 0, AFI_AXI_BAR4_START);
-	afi_writel(pcie, 0, AFI_AXI_BAR4_SZ);
-	afi_writel(pcie, 0, AFI_FPCI_BAR4);
+	afi_writel(pcie, AFI_AXI_BAR4_START, 0);
+	afi_writel(pcie, AFI_AXI_BAR4_SZ, 0);
+	afi_writel(pcie, AFI_FPCI_BAR4, 0);
 
-	afi_writel(pcie, 0, AFI_AXI_BAR5_START);
-	afi_writel(pcie, 0, AFI_AXI_BAR5_SZ);
-	afi_writel(pcie, 0, AFI_FPCI_BAR5);
+	afi_writel(pcie, AFI_AXI_BAR5_START, 0);
+	afi_writel(pcie, AFI_AXI_BAR5_SZ, 0);
+	afi_writel(pcie, AFI_FPCI_BAR5, 0);
 
 	/* map all upstream transactions as uncached */
-	afi_writel(pcie, 0, AFI_CACHE_BAR0_ST);
-	afi_writel(pcie, 0, AFI_CACHE_BAR0_SZ);
-	afi_writel(pcie, 0, AFI_CACHE_BAR1_ST);
-	afi_writel(pcie, 0, AFI_CACHE_BAR1_SZ);
+	afi_writel(pcie, AFI_CACHE_BAR0_ST, 0);
+	afi_writel(pcie, AFI_CACHE_BAR0_SZ, 0);
+	afi_writel(pcie, AFI_CACHE_BAR1_ST, 0);
+	afi_writel(pcie, AFI_CACHE_BAR1_SZ, 0);
 
 	/* MSI translations are setup only when needed */
-	afi_writel(pcie, 0, AFI_MSI_FPCI_BAR_ST);
-	afi_writel(pcie, 0, AFI_MSI_BAR_SZ);
-	afi_writel(pcie, 0, AFI_MSI_AXI_BAR_ST);
-	afi_writel(pcie, 0, AFI_MSI_BAR_SZ);
+	afi_writel(pcie, AFI_MSI_FPCI_BAR_ST, 0);
+	afi_writel(pcie, AFI_MSI_BAR_SZ, 0);
+	afi_writel(pcie, AFI_MSI_AXI_BAR_ST, 0);
+	afi_writel(pcie, AFI_MSI_BAR_SZ, 0);
 }
 
 static int tegra_pcie_pll_wait(struct tegra_pcie *pcie, unsigned long timeout)
@@ -987,12 +986,12 @@ static int tegra_pcie_enable_controller(struct tegra_pcie *pcie)
 		value = afi_readl(pcie, AFI_PLLE_CONTROL);
 		value &= ~AFI_PLLE_CONTROL_BYPASS_PADS2PLLE_CONTROL;
 		value |= AFI_PLLE_CONTROL_PADS2PLLE_CONTROL_EN;
-		afi_writel(pcie, value, AFI_PLLE_CONTROL);
+		afi_writel(pcie, AFI_PLLE_CONTROL, value);
 	}
 
 	/* power down PCIe slot clock bias pad */
 	if (soc->has_pex_bias_ctrl)
-		afi_writel(pcie, 0, AFI_PEXBIAS_CTRL_0);
+		afi_writel(pcie, AFI_PEXBIAS_CTRL_0, 0);
 
 	/* configure mode and disable all ports */
 	value = afi_readl(pcie, AFI_PCIE_CONFIG);
@@ -1002,16 +1001,16 @@ static int tegra_pcie_enable_controller(struct tegra_pcie *pcie)
 	list_for_each_entry(port, &pcie->ports, list)
 		value &= ~AFI_PCIE_CONFIG_PCIE_DISABLE(port->index);
 
-	afi_writel(pcie, value, AFI_PCIE_CONFIG);
+	afi_writel(pcie, AFI_PCIE_CONFIG, value);
 
 	if (soc->has_gen2) {
 		value = afi_readl(pcie, AFI_FUSE);
 		value &= ~AFI_FUSE_PCIE_T0_GEN2_DIS;
-		afi_writel(pcie, value, AFI_FUSE);
+		afi_writel(pcie, AFI_FUSE, value);
 	} else {
 		value = afi_readl(pcie, AFI_FUSE);
 		value |= AFI_FUSE_PCIE_T0_GEN2_DIS;
-		afi_writel(pcie, value, AFI_FUSE);
+		afi_writel(pcie, AFI_FUSE, value);
 	}
 
 	err = tegra_pcie_phy_power_on(pcie);
@@ -1026,7 +1025,7 @@ static int tegra_pcie_enable_controller(struct tegra_pcie *pcie)
 	/* finally enable PCIe */
 	value = afi_readl(pcie, AFI_CONFIGURATION);
 	value |= AFI_CONFIGURATION_EN_FPCI;
-	afi_writel(pcie, value, AFI_CONFIGURATION);
+	afi_writel(pcie, AFI_CONFIGURATION, value);
 
 	value = AFI_INTR_EN_INI_SLVERR | AFI_INTR_EN_INI_DECERR |
 		AFI_INTR_EN_TGT_SLVERR | AFI_INTR_EN_TGT_DECERR |
@@ -1035,14 +1034,14 @@ static int tegra_pcie_enable_controller(struct tegra_pcie *pcie)
 	if (soc->has_intr_prsnt_sense)
 		value |= AFI_INTR_EN_PRSNT_SENSE;
 
-	afi_writel(pcie, value, AFI_AFI_INTR_ENABLE);
-	afi_writel(pcie, 0xffffffff, AFI_SM_INTR_ENABLE);
+	afi_writel(pcie, AFI_AFI_INTR_ENABLE, value);
+	afi_writel(pcie, AFI_SM_INTR_ENABLE, 0xffffffff);
 
 	/* don't enable MSI for now, only when needed */
-	afi_writel(pcie, AFI_INTR_MASK_INT_MASK, AFI_INTR_MASK);
+	afi_writel(pcie, AFI_INTR_MASK, AFI_INTR_MASK_INT_MASK);
 
 	/* disable all exceptions */
-	afi_writel(pcie, 0, AFI_FPCI_ERROR_MASKS);
+	afi_writel(pcie, AFI_FPCI_ERROR_MASKS, 0);
 
 	return 0;
 }
@@ -1396,7 +1395,7 @@ static irqreturn_t tegra_pcie_msi_irq(int irq, void *data)
 			unsigned int irq;
 
 			/* clear the interrupt */
-			afi_writel(pcie, 1 << offset, AFI_MSI_VEC0 + i * 4);
+			afi_writel(pcie, AFI_MSI_VEC0 + i * 4, 1 << offset);
 
 			irq = irq_find_mapping(msi->domain, index);
 			if (irq) {
@@ -1527,25 +1526,25 @@ static int tegra_pcie_enable_msi(struct tegra_pcie *pcie)
 	msi->pages = __get_free_pages(GFP_KERNEL, 0);
 	base = virt_to_phys((void *)msi->pages);
 
-	afi_writel(pcie, base >> soc->msi_base_shift, AFI_MSI_FPCI_BAR_ST);
-	afi_writel(pcie, base, AFI_MSI_AXI_BAR_ST);
+	afi_writel(pcie, AFI_MSI_FPCI_BAR_ST, base >> soc->msi_base_shift);
+	afi_writel(pcie, AFI_MSI_AXI_BAR_ST, base);
 	/* this register is in 4K increments */
-	afi_writel(pcie, 1, AFI_MSI_BAR_SZ);
+	afi_writel(pcie, AFI_MSI_BAR_SZ, 1);
 
 	/* enable all MSI vectors */
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC0);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC1);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC2);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC3);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC4);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC5);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC6);
-	afi_writel(pcie, 0xffffffff, AFI_MSI_EN_VEC7);
+	afi_writel(pcie, AFI_MSI_EN_VEC0, 0xffffffff);
+	afi_writel(pcie, AFI_MSI_EN_VEC1, 0xffffffff);
+	afi_writel(pcie, AFI_MSI_EN_VEC2, 0xffffffff);
+	afi_writel(pcie, AFI_MSI_EN_VEC3, 0xffffffff);
+	afi_writel(pcie, AFI_MSI_EN_VEC4, 0xffffffff);
+	afi_writel(pcie, AFI_MSI_EN_VEC5, 0xffffffff);
+	afi_writel(pcie, AFI_MSI_EN_VEC6, 0xffffffff);
+	afi_writel(pcie, AFI_MSI_EN_VEC7, 0xffffffff);
 
 	/* and unmask the MSI interrupt */
 	reg = afi_readl(pcie, AFI_INTR_MASK);
 	reg |= AFI_INTR_MASK_MSI_MASK;
-	afi_writel(pcie, reg, AFI_INTR_MASK);
+	afi_writel(pcie, AFI_INTR_MASK, reg);
 
 	return 0;
 
@@ -1563,17 +1562,17 @@ static int tegra_pcie_disable_msi(struct tegra_pcie *pcie)
 	/* mask the MSI interrupt */
 	value = afi_readl(pcie, AFI_INTR_MASK);
 	value &= ~AFI_INTR_MASK_MSI_MASK;
-	afi_writel(pcie, value, AFI_INTR_MASK);
+	afi_writel(pcie, AFI_INTR_MASK, value);
 
 	/* disable all MSI vectors */
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC0);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC1);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC2);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC3);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC4);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC5);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC6);
-	afi_writel(pcie, 0, AFI_MSI_EN_VEC7);
+	afi_writel(pcie, AFI_MSI_EN_VEC0, 0);
+	afi_writel(pcie, AFI_MSI_EN_VEC1, 0);
+	afi_writel(pcie, AFI_MSI_EN_VEC2, 0);
+	afi_writel(pcie, AFI_MSI_EN_VEC3, 0);
+	afi_writel(pcie, AFI_MSI_EN_VEC4, 0);
+	afi_writel(pcie, AFI_MSI_EN_VEC5, 0);
+	afi_writel(pcie, AFI_MSI_EN_VEC6, 0);
+	afi_writel(pcie, AFI_MSI_EN_VEC7, 0);
 
 	free_pages(msi->pages, 0);
 

Re: [PATCH 2/5] PCI: tegra: Swap order of afi_writel() reg/val arguments

[Thierry Reding]

[-- Attachment #1: Type: text/plain, Size: 642 bytes --]

On Fri, Oct 07, 2016 at 11:26:24AM -0500, Bjorn Helgaas wrote:
> Swap order of afi_writel() arguments to match the "dev, pos, val"
> order used by pci_write_config_word() and other drivers.  No functional
> change intended.
> 
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
> ---
>  drivers/pci/host/pci-tegra.c |  133 +++++++++++++++++++++---------------------
>  1 file changed, 66 insertions(+), 67 deletions(-)

Most Tegra drivers that I'm aware of follow the (value, offset) style of
the writel() function. But this is your turf, so if you prefer this for
consistency:

Acked-by: Thierry Reding <treding@nvidia.com>

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 801 bytes --]

[PATCH 3/5] PCI: tegra: Swap order of pads_writel() reg/val arguments

[Bjorn Helgaas]

Swap order of pads_writel() arguments to match the "dev, pos, val"
order used by pci_write_config_word() and other drivers.  No functional
change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/host/pci-tegra.c |   30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index 146b69f..4b01893 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -337,13 +337,13 @@ static u32 afi_readl(struct tegra_pcie *pcie, unsigned long offset)
 	return readl(pcie->afi + offset);
 }
 
-static inline void pads_writel(struct tegra_pcie *pcie, u32 value,
-			       unsigned long offset)
+static void pads_writel(struct tegra_pcie *pcie, unsigned long offset,
+			u32 value)
 {
 	writel(value, pcie->pads + offset);
 }
 
-static inline u32 pads_readl(struct tegra_pcie *pcie, unsigned long offset)
+static u32 pads_readl(struct tegra_pcie *pcie, unsigned long offset)
 {
 	return readl(pcie->pads + offset);
 }
@@ -797,12 +797,12 @@ static int tegra_pcie_phy_enable(struct tegra_pcie *pcie)
 	int err;
 
 	/* initialize internal PHY, enable up to 16 PCIE lanes */
-	pads_writel(pcie, 0x0, PADS_CTL_SEL);
+	pads_writel(pcie, PADS_CTL_SEL, 0);
 
 	/* override IDDQ to 1 on all 4 lanes */
 	value = pads_readl(pcie, PADS_CTL);
 	value |= PADS_CTL_IDDQ_1L;
-	pads_writel(pcie, value, PADS_CTL);
+	pads_writel(pcie, PADS_CTL, value);
 
 	/*
 	 * Set up PHY PLL inputs select PLLE output as refclock,
@@ -811,19 +811,19 @@ static int tegra_pcie_phy_enable(struct tegra_pcie *pcie)
 	value = pads_readl(pcie, soc->pads_pll_ctl);
 	value &= ~(PADS_PLL_CTL_REFCLK_MASK | PADS_PLL_CTL_TXCLKREF_MASK);
 	value |= PADS_PLL_CTL_REFCLK_INTERNAL_CML | soc->tx_ref_sel;
-	pads_writel(pcie, value, soc->pads_pll_ctl);
+	pads_writel(pcie, soc->pads_pll_ctl, value);
 
 	/* reset PLL */
 	value = pads_readl(pcie, soc->pads_pll_ctl);
 	value &= ~PADS_PLL_CTL_RST_B4SM;
-	pads_writel(pcie, value, soc->pads_pll_ctl);
+	pads_writel(pcie, soc->pads_pll_ctl, value);
 
 	usleep_range(20, 100);
 
 	/* take PLL out of reset  */
 	value = pads_readl(pcie, soc->pads_pll_ctl);
 	value |= PADS_PLL_CTL_RST_B4SM;
-	pads_writel(pcie, value, soc->pads_pll_ctl);
+	pads_writel(pcie, soc->pads_pll_ctl, value);
 
 	/* wait for the PLL to lock */
 	err = tegra_pcie_pll_wait(pcie, 500);
@@ -835,12 +835,12 @@ static int tegra_pcie_phy_enable(struct tegra_pcie *pcie)
 	/* turn off IDDQ override */
 	value = pads_readl(pcie, PADS_CTL);
 	value &= ~PADS_CTL_IDDQ_1L;
-	pads_writel(pcie, value, PADS_CTL);
+	pads_writel(pcie, PADS_CTL, value);
 
 	/* enable TX/RX data */
 	value = pads_readl(pcie, PADS_CTL);
 	value |= PADS_CTL_TX_DATA_EN_1L | PADS_CTL_RX_DATA_EN_1L;
-	pads_writel(pcie, value, PADS_CTL);
+	pads_writel(pcie, PADS_CTL, value);
 
 	return 0;
 }
@@ -853,17 +853,17 @@ static int tegra_pcie_phy_disable(struct tegra_pcie *pcie)
 	/* disable TX/RX data */
 	value = pads_readl(pcie, PADS_CTL);
 	value &= ~(PADS_CTL_TX_DATA_EN_1L | PADS_CTL_RX_DATA_EN_1L);
-	pads_writel(pcie, value, PADS_CTL);
+	pads_writel(pcie, PADS_CTL, value);
 
 	/* override IDDQ */
 	value = pads_readl(pcie, PADS_CTL);
 	value |= PADS_CTL_IDDQ_1L;
-	pads_writel(pcie, value, PADS_CTL);
+	pads_writel(pcie, PADS_CTL, value);
 
 	/* reset PLL */
 	value = pads_readl(pcie, soc->pads_pll_ctl);
 	value &= ~PADS_PLL_CTL_RST_B4SM;
-	pads_writel(pcie, value, soc->pads_pll_ctl);
+	pads_writel(pcie, soc->pads_pll_ctl, value);
 
 	usleep_range(20, 100);
 
@@ -935,10 +935,10 @@ static int tegra_pcie_phy_power_on(struct tegra_pcie *pcie)
 	}
 
 	/* Configure the reference clock driver */
-	pads_writel(pcie, soc->pads_refclk_cfg0, PADS_REFCLK_CFG0);
+	pads_writel(pcie, PADS_REFCLK_CFG0, soc->pads_refclk_cfg0);
 
 	if (soc->num_ports > 2)
-		pads_writel(pcie, soc->pads_refclk_cfg1, PADS_REFCLK_CFG1);
+		pads_writel(pcie, PADS_REFCLK_CFG1, soc->pads_refclk_cfg1);
 
 	return 0;
 }

Re: [PATCH 3/5] PCI: tegra: Swap order of pads_writel() reg/val arguments

[Thierry Reding]

[-- Attachment #1: Type: text/plain, Size: 468 bytes --]

On Fri, Oct 07, 2016 at 11:26:32AM -0500, Bjorn Helgaas wrote:
> Swap order of pads_writel() arguments to match the "dev, pos, val"
> order used by pci_write_config_word() and other drivers.  No functional
> change intended.
> 
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
> ---
>  drivers/pci/host/pci-tegra.c |   30 +++++++++++++++---------------
>  1 file changed, 15 insertions(+), 15 deletions(-)

Acked-by: Thierry Reding <treding@nvidia.com>

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 801 bytes --]

[PATCH 4/5] PCI: tegra: Add local struct device pointers

[Bjorn Helgaas]

Use a local "struct device *dev" for brevity and consistency with other
drivers.  No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/host/pci-tegra.c |  221 ++++++++++++++++++++++--------------------
 1 file changed, 114 insertions(+), 107 deletions(-)

diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index 4b01893..f5b112c 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -383,6 +383,7 @@ static unsigned long tegra_pcie_conf_offset(unsigned int devfn, int where)
 static struct tegra_pcie_bus *tegra_pcie_bus_alloc(struct tegra_pcie *pcie,
 						   unsigned int busnr)
 {
+	struct device *dev = pcie->dev;
 	pgprot_t prot = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
 				 L_PTE_XN | L_PTE_MT_DEV_SHARED | L_PTE_SHARED);
 	phys_addr_t cs = pcie->cs->start;
@@ -412,8 +413,7 @@ static struct tegra_pcie_bus *tegra_pcie_bus_alloc(struct tegra_pcie *pcie,
 
 		err = ioremap_page_range(virt, virt + SZ_64K, phys, prot);
 		if (err < 0) {
-			dev_err(pcie->dev, "ioremap_page_range() failed: %d\n",
-				err);
+			dev_err(dev, "ioremap_page_range() failed: %d\n", err);
 			goto unmap;
 		}
 	}
@@ -461,6 +461,7 @@ static void __iomem *tegra_pcie_map_bus(struct pci_bus *bus,
 					int where)
 {
 	struct tegra_pcie *pcie = sys_to_pcie(bus->sysdata);
+	struct device *dev = pcie->dev;
 	void __iomem *addr = NULL;
 
 	if (bus->number == 0) {
@@ -481,8 +482,7 @@ static void __iomem *tegra_pcie_map_bus(struct pci_bus *bus,
 				addr = (void __iomem *)b->area->addr;
 
 		if (!addr) {
-			dev_err(pcie->dev,
-				"failed to map cfg. space for bus %u\n",
+			dev_err(dev, "failed to map cfg. space for bus %u\n",
 				bus->number);
 			return NULL;
 		}
@@ -583,12 +583,13 @@ static void tegra_pcie_port_disable(struct tegra_pcie_port *port)
 static void tegra_pcie_port_free(struct tegra_pcie_port *port)
 {
 	struct tegra_pcie *pcie = port->pcie;
+	struct device *dev = pcie->dev;
 
-	devm_iounmap(pcie->dev, port->base);
-	devm_release_mem_region(pcie->dev, port->regs.start,
+	devm_iounmap(dev, port->base);
+	devm_release_mem_region(dev, port->regs.start,
 				resource_size(&port->regs));
 	list_del(&port->list);
-	devm_kfree(pcie->dev, port);
+	devm_kfree(dev, port);
 }
 
 /* Tegra PCIE root complex wrongly reports device class */
@@ -611,12 +612,13 @@ DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, tegra_pcie_relax_enable);
 static int tegra_pcie_setup(int nr, struct pci_sys_data *sys)
 {
 	struct tegra_pcie *pcie = sys_to_pcie(sys);
+	struct device *dev = pcie->dev;
 	int err;
 
 	sys->mem_offset = pcie->offset.mem;
 	sys->io_offset = pcie->offset.io;
 
-	err = devm_request_resource(pcie->dev, &iomem_resource, &pcie->io);
+	err = devm_request_resource(dev, &iomem_resource, &pcie->io);
 	if (err < 0)
 		return err;
 
@@ -630,7 +632,7 @@ static int tegra_pcie_setup(int nr, struct pci_sys_data *sys)
 				sys->mem_offset);
 	pci_add_resource(&sys->resources, &pcie->busn);
 
-	err = devm_request_pci_bus_resources(pcie->dev, &sys->resources);
+	err = devm_request_pci_bus_resources(dev, &sys->resources);
 	if (err < 0)
 		return err;
 
@@ -671,6 +673,7 @@ static irqreturn_t tegra_pcie_isr(int irq, void *arg)
 		"Peer2Peer error",
 	};
 	struct tegra_pcie *pcie = arg;
+	struct device *dev = pcie->dev;
 	u32 code, signature;
 
 	code = afi_readl(pcie, AFI_INTR_CODE) & AFI_INTR_CODE_MASK;
@@ -688,11 +691,9 @@ static irqreturn_t tegra_pcie_isr(int irq, void *arg)
 	 * happen a lot during enumeration
 	 */
 	if (code == AFI_INTR_MASTER_ABORT)
-		dev_dbg(pcie->dev, "%s, signature: %08x\n", err_msg[code],
-			signature);
+		dev_dbg(dev, "%s, signature: %08x\n", err_msg[code], signature);
 	else
-		dev_err(pcie->dev, "%s, signature: %08x\n", err_msg[code],
-			signature);
+		dev_err(dev, "%s, signature: %08x\n", err_msg[code], signature);
 
 	if (code == AFI_INTR_TARGET_ABORT || code == AFI_INTR_MASTER_ABORT ||
 	    code == AFI_INTR_FPCI_DECODE_ERROR) {
@@ -700,9 +701,9 @@ static irqreturn_t tegra_pcie_isr(int irq, void *arg)
 		u64 address = (u64)fpci << 32 | (signature & 0xfffffffc);
 
 		if (code == AFI_INTR_MASTER_ABORT)
-			dev_dbg(pcie->dev, "  FPCI address: %10llx\n", address);
+			dev_dbg(dev, "  FPCI address: %10llx\n", address);
 		else
-			dev_err(pcie->dev, "  FPCI address: %10llx\n", address);
+			dev_err(dev, "  FPCI address: %10llx\n", address);
 	}
 
 	return IRQ_HANDLED;
@@ -879,8 +880,7 @@ static int tegra_pcie_port_phy_power_on(struct tegra_pcie_port *port)
 	for (i = 0; i < port->lanes; i++) {
 		err = phy_power_on(port->phys[i]);
 		if (err < 0) {
-			dev_err(dev, "failed to power on PHY#%u: %d\n", i,
-				err);
+			dev_err(dev, "failed to power on PHY#%u: %d\n", i, err);
 			return err;
 		}
 	}
@@ -908,6 +908,7 @@ static int tegra_pcie_port_phy_power_off(struct tegra_pcie_port *port)
 
 static int tegra_pcie_phy_power_on(struct tegra_pcie *pcie)
 {
+	struct device *dev = pcie->dev;
 	const struct tegra_pcie_soc *soc = pcie->soc;
 	struct tegra_pcie_port *port;
 	int err;
@@ -919,7 +920,7 @@ static int tegra_pcie_phy_power_on(struct tegra_pcie *pcie)
 			err = tegra_pcie_phy_enable(pcie);
 
 		if (err < 0)
-			dev_err(pcie->dev, "failed to power on PHY: %d\n", err);
+			dev_err(dev, "failed to power on PHY: %d\n", err);
 
 		return err;
 	}
@@ -927,7 +928,7 @@ static int tegra_pcie_phy_power_on(struct tegra_pcie *pcie)
 	list_for_each_entry(port, &pcie->ports, list) {
 		err = tegra_pcie_port_phy_power_on(port);
 		if (err < 0) {
-			dev_err(pcie->dev,
+			dev_err(dev,
 				"failed to power on PCIe port %u PHY: %d\n",
 				port->index, err);
 			return err;
@@ -945,6 +946,7 @@ static int tegra_pcie_phy_power_on(struct tegra_pcie *pcie)
 
 static int tegra_pcie_phy_power_off(struct tegra_pcie *pcie)
 {
+	struct device *dev = pcie->dev;
 	struct tegra_pcie_port *port;
 	int err;
 
@@ -955,8 +957,7 @@ static int tegra_pcie_phy_power_off(struct tegra_pcie *pcie)
 			err = tegra_pcie_phy_disable(pcie);
 
 		if (err < 0)
-			dev_err(pcie->dev, "failed to power off PHY: %d\n",
-				err);
+			dev_err(dev, "failed to power off PHY: %d\n", err);
 
 		return err;
 	}
@@ -964,7 +965,7 @@ static int tegra_pcie_phy_power_off(struct tegra_pcie *pcie)
 	list_for_each_entry(port, &pcie->ports, list) {
 		err = tegra_pcie_port_phy_power_off(port);
 		if (err < 0) {
-			dev_err(pcie->dev,
+			dev_err(dev,
 				"failed to power off PCIe port %u PHY: %d\n",
 				port->index, err);
 			return err;
@@ -1048,13 +1049,14 @@ static int tegra_pcie_enable_controller(struct tegra_pcie *pcie)
 
 static void tegra_pcie_power_off(struct tegra_pcie *pcie)
 {
+	struct device *dev = pcie->dev;
 	int err;
 
 	/* TODO: disable and unprepare clocks? */
 
 	err = tegra_pcie_phy_power_off(pcie);
 	if (err < 0)
-		dev_err(pcie->dev, "failed to power off PHY(s): %d\n", err);
+		dev_err(dev, "failed to power off PHY(s): %d\n", err);
 
 	reset_control_assert(pcie->pcie_xrst);
 	reset_control_assert(pcie->afi_rst);
@@ -1064,11 +1066,12 @@ static void tegra_pcie_power_off(struct tegra_pcie *pcie)
 
 	err = regulator_bulk_disable(pcie->num_supplies, pcie->supplies);
 	if (err < 0)
-		dev_warn(pcie->dev, "failed to disable regulators: %d\n", err);
+		dev_warn(dev, "failed to disable regulators: %d\n", err);
 }
 
 static int tegra_pcie_power_on(struct tegra_pcie *pcie)
 {
+	struct device *dev = pcie->dev;
 	const struct tegra_pcie_soc *soc = pcie->soc;
 	int err;
 
@@ -1081,13 +1084,13 @@ static int tegra_pcie_power_on(struct tegra_pcie *pcie)
 	/* enable regulators */
 	err = regulator_bulk_enable(pcie->num_supplies, pcie->supplies);
 	if (err < 0)
-		dev_err(pcie->dev, "failed to enable regulators: %d\n", err);
+		dev_err(dev, "failed to enable regulators: %d\n", err);
 
 	err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_PCIE,
 						pcie->pex_clk,
 						pcie->pex_rst);
 	if (err) {
-		dev_err(pcie->dev, "powerup sequence failed: %d\n", err);
+		dev_err(dev, "powerup sequence failed: %d\n", err);
 		return err;
 	}
 
@@ -1095,22 +1098,21 @@ static int tegra_pcie_power_on(struct tegra_pcie *pcie)
 
 	err = clk_prepare_enable(pcie->afi_clk);
 	if (err < 0) {
-		dev_err(pcie->dev, "failed to enable AFI clock: %d\n", err);
+		dev_err(dev, "failed to enable AFI clock: %d\n", err);
 		return err;
 	}
 
 	if (soc->has_cml_clk) {
 		err = clk_prepare_enable(pcie->cml_clk);
 		if (err < 0) {
-			dev_err(pcie->dev, "failed to enable CML clock: %d\n",
-				err);
+			dev_err(dev, "failed to enable CML clock: %d\n", err);
 			return err;
 		}
 	}
 
 	err = clk_prepare_enable(pcie->pll_e);
 	if (err < 0) {
-		dev_err(pcie->dev, "failed to enable PLLE clock: %d\n", err);
+		dev_err(dev, "failed to enable PLLE clock: %d\n", err);
 		return err;
 	}
 
@@ -1119,22 +1121,23 @@ static int tegra_pcie_power_on(struct tegra_pcie *pcie)
 
 static int tegra_pcie_clocks_get(struct tegra_pcie *pcie)
 {
+	struct device *dev = pcie->dev;
 	const struct tegra_pcie_soc *soc = pcie->soc;
 
-	pcie->pex_clk = devm_clk_get(pcie->dev, "pex");
+	pcie->pex_clk = devm_clk_get(dev, "pex");
 	if (IS_ERR(pcie->pex_clk))
 		return PTR_ERR(pcie->pex_clk);
 
-	pcie->afi_clk = devm_clk_get(pcie->dev, "afi");
+	pcie->afi_clk = devm_clk_get(dev, "afi");
 	if (IS_ERR(pcie->afi_clk))
 		return PTR_ERR(pcie->afi_clk);
 
-	pcie->pll_e = devm_clk_get(pcie->dev, "pll_e");
+	pcie->pll_e = devm_clk_get(dev, "pll_e");
 	if (IS_ERR(pcie->pll_e))
 		return PTR_ERR(pcie->pll_e);
 
 	if (soc->has_cml_clk) {
-		pcie->cml_clk = devm_clk_get(pcie->dev, "cml");
+		pcie->cml_clk = devm_clk_get(dev, "cml");
 		if (IS_ERR(pcie->cml_clk))
 			return PTR_ERR(pcie->cml_clk);
 	}
@@ -1144,15 +1147,17 @@ static int tegra_pcie_clocks_get(struct tegra_pcie *pcie)
 
 static int tegra_pcie_resets_get(struct tegra_pcie *pcie)
 {
-	pcie->pex_rst = devm_reset_control_get(pcie->dev, "pex");
+	struct device *dev = pcie->dev;
+
+	pcie->pex_rst = devm_reset_control_get(dev, "pex");
 	if (IS_ERR(pcie->pex_rst))
 		return PTR_ERR(pcie->pex_rst);
 
-	pcie->afi_rst = devm_reset_control_get(pcie->dev, "afi");
+	pcie->afi_rst = devm_reset_control_get(dev, "afi");
 	if (IS_ERR(pcie->afi_rst))
 		return PTR_ERR(pcie->afi_rst);
 
-	pcie->pcie_xrst = devm_reset_control_get(pcie->dev, "pcie_x");
+	pcie->pcie_xrst = devm_reset_control_get(dev, "pcie_x");
 	if (IS_ERR(pcie->pcie_xrst))
 		return PTR_ERR(pcie->pcie_xrst);
 
@@ -1161,18 +1166,19 @@ static int tegra_pcie_resets_get(struct tegra_pcie *pcie)
 
 static int tegra_pcie_phys_get_legacy(struct tegra_pcie *pcie)
 {
+	struct device *dev = pcie->dev;
 	int err;
 
-	pcie->phy = devm_phy_optional_get(pcie->dev, "pcie");
+	pcie->phy = devm_phy_optional_get(dev, "pcie");
 	if (IS_ERR(pcie->phy)) {
 		err = PTR_ERR(pcie->phy);
-		dev_err(pcie->dev, "failed to get PHY: %d\n", err);
+		dev_err(dev, "failed to get PHY: %d\n", err);
 		return err;
 	}
 
 	err = phy_init(pcie->phy);
 	if (err < 0) {
-		dev_err(pcie->dev, "failed to initialize PHY: %d\n", err);
+		dev_err(dev, "failed to initialize PHY: %d\n", err);
 		return err;
 	}
 
@@ -1255,43 +1261,44 @@ static int tegra_pcie_phys_get(struct tegra_pcie *pcie)
 
 static int tegra_pcie_get_resources(struct tegra_pcie *pcie)
 {
-	struct platform_device *pdev = to_platform_device(pcie->dev);
+	struct device *dev = pcie->dev;
+	struct platform_device *pdev = to_platform_device(dev);
 	struct resource *pads, *afi, *res;
 	int err;
 
 	err = tegra_pcie_clocks_get(pcie);
 	if (err) {
-		dev_err(&pdev->dev, "failed to get clocks: %d\n", err);
+		dev_err(dev, "failed to get clocks: %d\n", err);
 		return err;
 	}
 
 	err = tegra_pcie_resets_get(pcie);
 	if (err) {
-		dev_err(&pdev->dev, "failed to get resets: %d\n", err);
+		dev_err(dev, "failed to get resets: %d\n", err);
 		return err;
 	}
 
 	err = tegra_pcie_phys_get(pcie);
 	if (err < 0) {
-		dev_err(&pdev->dev, "failed to get PHYs: %d\n", err);
+		dev_err(dev, "failed to get PHYs: %d\n", err);
 		return err;
 	}
 
 	err = tegra_pcie_power_on(pcie);
 	if (err) {
-		dev_err(&pdev->dev, "failed to power up: %d\n", err);
+		dev_err(dev, "failed to power up: %d\n", err);
 		return err;
 	}
 
 	pads = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pads");
-	pcie->pads = devm_ioremap_resource(&pdev->dev, pads);
+	pcie->pads = devm_ioremap_resource(dev, pads);
 	if (IS_ERR(pcie->pads)) {
 		err = PTR_ERR(pcie->pads);
 		goto poweroff;
 	}
 
 	afi = platform_get_resource_byname(pdev, IORESOURCE_MEM, "afi");
-	pcie->afi = devm_ioremap_resource(&pdev->dev, afi);
+	pcie->afi = devm_ioremap_resource(dev, afi);
 	if (IS_ERR(pcie->afi)) {
 		err = PTR_ERR(pcie->afi);
 		goto poweroff;
@@ -1304,7 +1311,7 @@ static int tegra_pcie_get_resources(struct tegra_pcie *pcie)
 		goto poweroff;
 	}
 
-	pcie->cs = devm_request_mem_region(pcie->dev, res->start,
+	pcie->cs = devm_request_mem_region(dev, res->start,
 					   resource_size(res), res->name);
 	if (!pcie->cs) {
 		err = -EADDRNOTAVAIL;
@@ -1314,7 +1321,7 @@ static int tegra_pcie_get_resources(struct tegra_pcie *pcie)
 	/* request interrupt */
 	err = platform_get_irq_byname(pdev, "intr");
 	if (err < 0) {
-		dev_err(&pdev->dev, "failed to get IRQ: %d\n", err);
+		dev_err(dev, "failed to get IRQ: %d\n", err);
 		goto poweroff;
 	}
 
@@ -1322,7 +1329,7 @@ static int tegra_pcie_get_resources(struct tegra_pcie *pcie)
 
 	err = request_irq(pcie->irq, tegra_pcie_isr, IRQF_SHARED, "PCIE", pcie);
 	if (err) {
-		dev_err(&pdev->dev, "failed to register IRQ: %d\n", err);
+		dev_err(dev, "failed to register IRQ: %d\n", err);
 		goto poweroff;
 	}
 
@@ -1383,6 +1390,7 @@ static void tegra_msi_free(struct tegra_msi *chip, unsigned long irq)
 static irqreturn_t tegra_pcie_msi_irq(int irq, void *data)
 {
 	struct tegra_pcie *pcie = data;
+	struct device *dev = pcie->dev;
 	struct tegra_msi *msi = &pcie->msi;
 	unsigned int i, processed = 0;
 
@@ -1402,13 +1410,13 @@ static irqreturn_t tegra_pcie_msi_irq(int irq, void *data)
 				if (test_bit(index, msi->used))
 					generic_handle_irq(irq);
 				else
-					dev_info(pcie->dev, "unhandled MSI\n");
+					dev_info(dev, "unhandled MSI\n");
 			} else {
 				/*
 				 * that's weird who triggered this?
 				 * just clear it
 				 */
-				dev_info(pcie->dev, "unexpected MSI\n");
+				dev_info(dev, "unexpected MSI\n");
 			}
 
 			/* see if there's any more pending in this vector */
@@ -1487,7 +1495,8 @@ static const struct irq_domain_ops msi_domain_ops = {
 
 static int tegra_pcie_enable_msi(struct tegra_pcie *pcie)
 {
-	struct platform_device *pdev = to_platform_device(pcie->dev);
+	struct device *dev = pcie->dev;
+	struct platform_device *pdev = to_platform_device(dev);
 	const struct tegra_pcie_soc *soc = pcie->soc;
 	struct tegra_msi *msi = &pcie->msi;
 	unsigned long base;
@@ -1496,20 +1505,20 @@ static int tegra_pcie_enable_msi(struct tegra_pcie *pcie)
 
 	mutex_init(&msi->lock);
 
-	msi->chip.dev = pcie->dev;
+	msi->chip.dev = dev;
 	msi->chip.setup_irq = tegra_msi_setup_irq;
 	msi->chip.teardown_irq = tegra_msi_teardown_irq;
 
-	msi->domain = irq_domain_add_linear(pcie->dev->of_node, INT_PCI_MSI_NR,
+	msi->domain = irq_domain_add_linear(dev->of_node, INT_PCI_MSI_NR,
 					    &msi_domain_ops, &msi->chip);
 	if (!msi->domain) {
-		dev_err(&pdev->dev, "failed to create IRQ domain\n");
+		dev_err(dev, "failed to create IRQ domain\n");
 		return -ENOMEM;
 	}
 
 	err = platform_get_irq_byname(pdev, "msi");
 	if (err < 0) {
-		dev_err(&pdev->dev, "failed to get IRQ: %d\n", err);
+		dev_err(dev, "failed to get IRQ: %d\n", err);
 		goto err;
 	}
 
@@ -1518,7 +1527,7 @@ static int tegra_pcie_enable_msi(struct tegra_pcie *pcie)
 	err = request_irq(msi->irq, tegra_pcie_msi_irq, IRQF_NO_THREAD,
 			  tegra_msi_irq_chip.name, pcie);
 	if (err < 0) {
-		dev_err(&pdev->dev, "failed to request IRQ: %d\n", err);
+		dev_err(dev, "failed to request IRQ: %d\n", err);
 		goto err;
 	}
 
@@ -1593,46 +1602,47 @@ static int tegra_pcie_disable_msi(struct tegra_pcie *pcie)
 static int tegra_pcie_get_xbar_config(struct tegra_pcie *pcie, u32 lanes,
 				      u32 *xbar)
 {
-	struct device_node *np = pcie->dev->of_node;
+	struct device *dev = pcie->dev;
+	struct device_node *np = dev->of_node;
 
 	if (of_device_is_compatible(np, "nvidia,tegra124-pcie")) {
 		switch (lanes) {
 		case 0x0000104:
-			dev_info(pcie->dev, "4x1, 1x1 configuration\n");
+			dev_info(dev, "4x1, 1x1 configuration\n");
 			*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X4_X1;
 			return 0;
 
 		case 0x0000102:
-			dev_info(pcie->dev, "2x1, 1x1 configuration\n");
+			dev_info(dev, "2x1, 1x1 configuration\n");
 			*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_X2_X1;
 			return 0;
 		}
 	} else if (of_device_is_compatible(np, "nvidia,tegra30-pcie")) {
 		switch (lanes) {
 		case 0x00000204:
-			dev_info(pcie->dev, "4x1, 2x1 configuration\n");
+			dev_info(dev, "4x1, 2x1 configuration\n");
 			*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_420;
 			return 0;
 
 		case 0x00020202:
-			dev_info(pcie->dev, "2x3 configuration\n");
+			dev_info(dev, "2x3 configuration\n");
 			*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_222;
 			return 0;
 
 		case 0x00010104:
-			dev_info(pcie->dev, "4x1, 1x2 configuration\n");
+			dev_info(dev, "4x1, 1x2 configuration\n");
 			*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_411;
 			return 0;
 		}
 	} else if (of_device_is_compatible(np, "nvidia,tegra20-pcie")) {
 		switch (lanes) {
 		case 0x00000004:
-			dev_info(pcie->dev, "single-mode configuration\n");
+			dev_info(dev, "single-mode configuration\n");
 			*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_SINGLE;
 			return 0;
 
 		case 0x00000202:
-			dev_info(pcie->dev, "dual-mode configuration\n");
+			dev_info(dev, "dual-mode configuration\n");
 			*xbar = AFI_PCIE_CONFIG_SM2TMS0_XBAR_CONFIG_DUAL;
 			return 0;
 		}
@@ -1672,7 +1682,8 @@ static bool of_regulator_bulk_available(struct device_node *np,
  */
 static int tegra_pcie_get_legacy_regulators(struct tegra_pcie *pcie)
 {
-	struct device_node *np = pcie->dev->of_node;
+	struct device *dev = pcie->dev;
+	struct device_node *np = dev->of_node;
 
 	if (of_device_is_compatible(np, "nvidia,tegra30-pcie"))
 		pcie->num_supplies = 3;
@@ -1680,12 +1691,12 @@ static int tegra_pcie_get_legacy_regulators(struct tegra_pcie *pcie)
 		pcie->num_supplies = 2;
 
 	if (pcie->num_supplies == 0) {
-		dev_err(pcie->dev, "device %s not supported in legacy mode\n",
+		dev_err(dev, "device %s not supported in legacy mode\n",
 			np->full_name);
 		return -ENODEV;
 	}
 
-	pcie->supplies = devm_kcalloc(pcie->dev, pcie->num_supplies,
+	pcie->supplies = devm_kcalloc(dev, pcie->num_supplies,
 				      sizeof(*pcie->supplies),
 				      GFP_KERNEL);
 	if (!pcie->supplies)
@@ -1697,8 +1708,7 @@ static int tegra_pcie_get_legacy_regulators(struct tegra_pcie *pcie)
 	if (pcie->num_supplies > 2)
 		pcie->supplies[2].supply = "avdd";
 
-	return devm_regulator_bulk_get(pcie->dev, pcie->num_supplies,
-				       pcie->supplies);
+	return devm_regulator_bulk_get(dev, pcie->num_supplies, pcie->supplies);
 }
 
 /*
@@ -1712,13 +1722,14 @@ static int tegra_pcie_get_legacy_regulators(struct tegra_pcie *pcie)
  */
 static int tegra_pcie_get_regulators(struct tegra_pcie *pcie, u32 lane_mask)
 {
-	struct device_node *np = pcie->dev->of_node;
+	struct device *dev = pcie->dev;
+	struct device_node *np = dev->of_node;
 	unsigned int i = 0;
 
 	if (of_device_is_compatible(np, "nvidia,tegra124-pcie")) {
 		pcie->num_supplies = 7;
 
-		pcie->supplies = devm_kcalloc(pcie->dev, pcie->num_supplies,
+		pcie->supplies = devm_kcalloc(dev, pcie->num_supplies,
 					      sizeof(*pcie->supplies),
 					      GFP_KERNEL);
 		if (!pcie->supplies)
@@ -1745,7 +1756,7 @@ static int tegra_pcie_get_regulators(struct tegra_pcie *pcie, u32 lane_mask)
 		pcie->num_supplies = 4 + (need_pexa ? 2 : 0) +
 					 (need_pexb ? 2 : 0);
 
-		pcie->supplies = devm_kcalloc(pcie->dev, pcie->num_supplies,
+		pcie->supplies = devm_kcalloc(dev, pcie->num_supplies,
 					      sizeof(*pcie->supplies),
 					      GFP_KERNEL);
 		if (!pcie->supplies)
@@ -1768,7 +1779,7 @@ static int tegra_pcie_get_regulators(struct tegra_pcie *pcie, u32 lane_mask)
 	} else if (of_device_is_compatible(np, "nvidia,tegra20-pcie")) {
 		pcie->num_supplies = 5;
 
-		pcie->supplies = devm_kcalloc(pcie->dev, pcie->num_supplies,
+		pcie->supplies = devm_kcalloc(dev, pcie->num_supplies,
 					      sizeof(*pcie->supplies),
 					      GFP_KERNEL);
 		if (!pcie->supplies)
@@ -1781,9 +1792,9 @@ static int tegra_pcie_get_regulators(struct tegra_pcie *pcie, u32 lane_mask)
 		pcie->supplies[4].supply = "vddio-pex-clk";
 	}
 
-	if (of_regulator_bulk_available(pcie->dev->of_node, pcie->supplies,
+	if (of_regulator_bulk_available(dev->of_node, pcie->supplies,
 					pcie->num_supplies))
-		return devm_regulator_bulk_get(pcie->dev, pcie->num_supplies,
+		return devm_regulator_bulk_get(dev, pcie->num_supplies,
 					       pcie->supplies);
 
 	/*
@@ -1791,9 +1802,9 @@ static int tegra_pcie_get_regulators(struct tegra_pcie *pcie, u32 lane_mask)
 	 * that the device tree complies with an older version of the device
 	 * tree binding.
 	 */
-	dev_info(pcie->dev, "using legacy DT binding for power supplies\n");
+	dev_info(dev, "using legacy DT binding for power supplies\n");
 
-	devm_kfree(pcie->dev, pcie->supplies);
+	devm_kfree(dev, pcie->supplies);
 	pcie->num_supplies = 0;
 
 	return tegra_pcie_get_legacy_regulators(pcie);
@@ -1801,7 +1812,8 @@ static int tegra_pcie_get_regulators(struct tegra_pcie *pcie, u32 lane_mask)
 
 static int tegra_pcie_parse_dt(struct tegra_pcie *pcie)
 {
-	struct device_node *np = pcie->dev->of_node, *port;
+	struct device *dev = pcie->dev;
+	struct device_node *np = dev->of_node, *port;
 	const struct tegra_pcie_soc *soc = pcie->soc;
 	struct of_pci_range_parser parser;
 	struct of_pci_range range;
@@ -1811,7 +1823,7 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie)
 	int err;
 
 	if (of_pci_range_parser_init(&parser, np)) {
-		dev_err(pcie->dev, "missing \"ranges\" property\n");
+		dev_err(dev, "missing \"ranges\" property\n");
 		return -EINVAL;
 	}
 
@@ -1866,8 +1878,7 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie)
 
 	err = of_pci_parse_bus_range(np, &pcie->busn);
 	if (err < 0) {
-		dev_err(pcie->dev, "failed to parse ranges property: %d\n",
-			err);
+		dev_err(dev, "failed to parse ranges property: %d\n", err);
 		pcie->busn.name = np->name;
 		pcie->busn.start = 0;
 		pcie->busn.end = 0xff;
@@ -1882,15 +1893,14 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie)
 
 		err = of_pci_get_devfn(port);
 		if (err < 0) {
-			dev_err(pcie->dev, "failed to parse address: %d\n",
-				err);
+			dev_err(dev, "failed to parse address: %d\n", err);
 			return err;
 		}
 
 		index = PCI_SLOT(err);
 
 		if (index < 1 || index > soc->num_ports) {
-			dev_err(pcie->dev, "invalid port number: %d\n", index);
+			dev_err(dev, "invalid port number: %d\n", index);
 			return -EINVAL;
 		}
 
@@ -1898,13 +1908,13 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie)
 
 		err = of_property_read_u32(port, "nvidia,num-lanes", &value);
 		if (err < 0) {
-			dev_err(pcie->dev, "failed to parse # of lanes: %d\n",
+			dev_err(dev, "failed to parse # of lanes: %d\n",
 				err);
 			return err;
 		}
 
 		if (value > 16) {
-			dev_err(pcie->dev, "invalid # of lanes: %u\n", value);
+			dev_err(dev, "invalid # of lanes: %u\n", value);
 			return -EINVAL;
 		}
 
@@ -1918,14 +1928,13 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie)
 		mask |= ((1 << value) - 1) << lane;
 		lane += value;
 
-		rp = devm_kzalloc(pcie->dev, sizeof(*rp), GFP_KERNEL);
+		rp = devm_kzalloc(dev, sizeof(*rp), GFP_KERNEL);
 		if (!rp)
 			return -ENOMEM;
 
 		err = of_address_to_resource(port, 0, &rp->regs);
 		if (err < 0) {
-			dev_err(pcie->dev, "failed to parse address: %d\n",
-				err);
+			dev_err(dev, "failed to parse address: %d\n", err);
 			return err;
 		}
 
@@ -1935,7 +1944,7 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie)
 		rp->pcie = pcie;
 		rp->np = port;
 
-		rp->base = devm_ioremap_resource(pcie->dev, &rp->regs);
+		rp->base = devm_ioremap_resource(dev, &rp->regs);
 		if (IS_ERR(rp->base))
 			return PTR_ERR(rp->base);
 
@@ -1944,7 +1953,7 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie)
 
 	err = tegra_pcie_get_xbar_config(pcie, lanes, &pcie->xbar_config);
 	if (err < 0) {
-		dev_err(pcie->dev, "invalid lane configuration\n");
+		dev_err(dev, "invalid lane configuration\n");
 		return err;
 	}
 
@@ -2010,11 +2019,12 @@ retry:
 
 static int tegra_pcie_enable(struct tegra_pcie *pcie)
 {
+	struct device *dev = pcie->dev;
 	struct tegra_pcie_port *port, *tmp;
 	struct hw_pci hw;
 
 	list_for_each_entry_safe(port, tmp, &pcie->ports, list) {
-		dev_info(pcie->dev, "probing port %u, using %u lanes\n",
+		dev_info(dev, "probing port %u, using %u lanes\n",
 			 port->index, port->lanes);
 
 		tegra_pcie_port_enable(port);
@@ -2022,7 +2032,7 @@ static int tegra_pcie_enable(struct tegra_pcie *pcie)
 		if (tegra_pcie_port_check_link(port))
 			continue;
 
-		dev_info(pcie->dev, "link %u down, ignoring\n", port->index);
+		dev_info(dev, "link %u down, ignoring\n", port->index);
 
 		tegra_pcie_port_disable(port);
 		tegra_pcie_port_free(port);
@@ -2040,8 +2050,7 @@ static int tegra_pcie_enable(struct tegra_pcie *pcie)
 	hw.map_irq = tegra_pcie_map_irq;
 	hw.ops = &tegra_pcie_ops;
 
-	pci_common_init_dev(pcie->dev, &hw);
-
+	pci_common_init_dev(dev, &hw);
 	return 0;
 }
 
@@ -2203,17 +2212,18 @@ remove:
 
 static int tegra_pcie_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct tegra_pcie *pcie;
 	int err;
 
-	pcie = devm_kzalloc(&pdev->dev, sizeof(*pcie), GFP_KERNEL);
+	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
 	if (!pcie)
 		return -ENOMEM;
 
-	pcie->soc = of_device_get_match_data(&pdev->dev);
+	pcie->soc = of_device_get_match_data(dev);
 	INIT_LIST_HEAD(&pcie->buses);
 	INIT_LIST_HEAD(&pcie->ports);
-	pcie->dev = &pdev->dev;
+	pcie->dev = dev;
 
 	err = tegra_pcie_parse_dt(pcie);
 	if (err < 0)
@@ -2221,7 +2231,7 @@ static int tegra_pcie_probe(struct platform_device *pdev)
 
 	err = tegra_pcie_get_resources(pcie);
 	if (err < 0) {
-		dev_err(&pdev->dev, "failed to request resources: %d\n", err);
+		dev_err(dev, "failed to request resources: %d\n", err);
 		return err;
 	}
 
@@ -2235,24 +2245,21 @@ static int tegra_pcie_probe(struct platform_device *pdev)
 	if (IS_ENABLED(CONFIG_PCI_MSI)) {
 		err = tegra_pcie_enable_msi(pcie);
 		if (err < 0) {
-			dev_err(&pdev->dev,
-				"failed to enable MSI support: %d\n",
-				err);
+			dev_err(dev, "failed to enable MSI support: %d\n", err);
 			goto put_resources;
 		}
 	}
 
 	err = tegra_pcie_enable(pcie);
 	if (err < 0) {
-		dev_err(&pdev->dev, "failed to enable PCIe ports: %d\n", err);
+		dev_err(dev, "failed to enable PCIe ports: %d\n", err);
 		goto disable_msi;
 	}
 
 	if (IS_ENABLED(CONFIG_DEBUG_FS)) {
 		err = tegra_pcie_debugfs_init(pcie);
 		if (err < 0)
-			dev_err(&pdev->dev, "failed to setup debugfs: %d\n",
-				err);
+			dev_err(dev, "failed to setup debugfs: %d\n", err);
 	}
 
 	platform_set_drvdata(pdev, pcie);

Re: [PATCH 4/5] PCI: tegra: Add local struct device pointers

[Thierry Reding]

[-- Attachment #1: Type: text/plain, Size: 436 bytes --]

On Fri, Oct 07, 2016 at 11:26:40AM -0500, Bjorn Helgaas wrote:
> Use a local "struct device *dev" for brevity and consistency with other
> drivers.  No functional change intended.
> 
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
> ---
>  drivers/pci/host/pci-tegra.c |  221 ++++++++++++++++++++++--------------------
>  1 file changed, 114 insertions(+), 107 deletions(-)

Acked-by: Thierry Reding <treding@nvidia.com>

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 801 bytes --]

[PATCH 5/5] PCI: tegra: Remove unused platform data

[Bjorn Helgaas]

The tegra driver never uses the platform drvdata pointer, so don't
bother setting it.  No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/host/pci-tegra.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c
index f5b112c..8f5cda7 100644
--- a/drivers/pci/host/pci-tegra.c
+++ b/drivers/pci/host/pci-tegra.c
@@ -2262,7 +2262,6 @@ static int tegra_pcie_probe(struct platform_device *pdev)
 			dev_err(dev, "failed to setup debugfs: %d\n", err);
 	}
 
-	platform_set_drvdata(pdev, pcie);
 	return 0;
 
 disable_msi:

Re: [PATCH 5/5] PCI: tegra: Remove unused platform data

[Thierry Reding]

[-- Attachment #1: Type: text/plain, Size: 507 bytes --]

On Fri, Oct 07, 2016 at 11:26:50AM -0500, Bjorn Helgaas wrote:
> The tegra driver never uses the platform drvdata pointer, so don't
> bother setting it.  No functional change intended.
> 
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
> ---
>  drivers/pci/host/pci-tegra.c |    1 -
>  1 file changed, 1 deletion(-)

This would get used again when this driver can become a module (or at
least unloadable). But anyway, it is unused *now*, so:

Acked-by: Thierry Reding <treding@nvidia.com>

[-- Attachment #2: signature.asc --]
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